https://www.selleckchem.com/pr....oducts/pf-04965842.h
Three mixed-alkali-metal fluorooxoborates, KNaB3O4F3 (I), K2B3O4F3 (II), and KCsB3O4F3 (III), were acquired in a closed system. I-III are isomorphic and adopt orthorhombic structures [Pbcn (No. 6] with wavy parallelly arranged pseudolayers composed of ∞1[B3O4F3] chains, which exhibit slight differences in the arrangement modes of the fundamental building blocks. First-principles calculations illustrate that they all have moderate birefringence and large band gaps on the order of 7.0 eV, suggesting deep-ultraviolet (DUV) cutoff edg
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